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Noise reduction filter
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A complete system is designed to analyze and filter the signal;
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Butterworth filter
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The characteristic of Butterworth filter is that the frequency response curve in the pass band is flat to the greatest extent without fluctuation, while it gradually drops to zero in the stop band. On the Bode diagram of logarithmic diagonal frequency of amplitude, starting from the corner frequency of one side, the amplitude decreases gradually with the increase of the corner frequency and tends to negative infinity.
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